diff --git a/src/proto/terminal.pro b/src/proto/terminal.pro
index f7ba72b..dfa59cc 100644
--- a/src/proto/terminal.pro
+++ b/src/proto/terminal.pro
@@ -2,6 +2,7 @@
 void init_job_options(jobopt_T *opt);
 buf_T *term_start(typval_T *argvar, char **argv, jobopt_T *opt, int flags);
 void ex_terminal(exarg_T *eap);
+int expand_terminal_opt(char_u *pat, expand_T *xp, regmatch_T *rmp, char_u ***matches, int *numMatches);
 int term_write_session(FILE *fd, win_T *wp, hashtab_T *terminal_bufs);
 int term_should_restore(buf_T *buf);
 void free_terminal(buf_T *buf);